refactor: move CLI argument validation to dedicated class

pr_agent/algo/cli_args.py

@@ -0,0 +1,34 @@
+from base64 import b64decode
+import hashlib
+
+class CliArgs:
+    @staticmethod
+    def validate_user_args(args: list) -> (bool, str):
+        try:
+            if not args:
+                return True, ""
+
+            # decode forbidden args
+            _encoded_args = 'ZW5hYmxlX2F1dG9fYXBwcm92YWw=:YXBwcm92ZV9wcl9vbl9zZWxmX3Jldmlldw==:YmFzZV91cmw=:dXJs:YXBwX25hbWU=:c2VjcmV0X3Byb3ZpZGVy:Z2l0X3Byb3ZpZGVy:c2tpcF9rZXlz:b3BlbmFpLmtleQ==:QU5BTFlUSUNTX0ZPTERFUg==:dXJp:YXBwX2lk:d2ViaG9va19zZWNyZXQ=:YmVhcmVyX3Rva2Vu:UEVSU09OQUxfQUNDRVNTX1RPS0VO:b3ZlcnJpZGVfZGVwbG95bWVudF90eXBl:cHJpdmF0ZV9rZXk=:bG9jYWxfY2FjaGVfcGF0aA==:ZW5hYmxlX2xvY2FsX2NhY2hl:amlyYV9iYXNlX3VybA==:YXBpX2Jhc2U=:YXBpX3R5cGU=:YXBpX3ZlcnNpb24=:c2tpcF9rZXlz'
+            forbidden_cli_args = []
+            for e in _encoded_args.split(':'):
+                forbidden_cli_args.append(b64decode(e).decode())
+
+            # lowercase all forbidden args
+            for i, _ in enumerate(forbidden_cli_args):
+                forbidden_cli_args[i] = forbidden_cli_args[i].lower()
+                if '.' not in forbidden_cli_args[i]:
+                    forbidden_cli_args[i] = '.' + forbidden_cli_args[i]
+
+            for arg in args:
+                if arg.startswith('--'):
+                    arg_word = arg.lower()
+                    arg_word = arg_word.replace('__', '.')  # replace double underscore with dot, e.g. --openai__key -> --openai.key
+                    for forbidden_arg_word in forbidden_cli_args:
+                        if forbidden_arg_word in arg_word:
+                            return False, forbidden_arg_word
+            return True, ""
+        except Exception as e:
+            return False, str(e)
+
+